Varnish composition.



CARLETON ELLIS, 0F WHITE Firms, NEW YORK, ASSIGNOR TO ELLIS-CHALMERS COM- PANY, A CORPORATION OF WEST VIRGINIA.

vhnnrsn comrosr'rron.

' Specification of Letters Patent.

Patented 0a. e, 1908.

application filed May 22, 1907. Serial No. 375,016.

To all whom it may concern."

Be it known that I, CARLETON ELLIS, a citizen of the United States, and resident of White Plains, in the county of Westchester even more than that amount; and as this resin seldom imparts to the gum qualities which are desirable, it is largely removed by suitable extraction as with acetone or methyl acetate or in other ways, affording a byproduct of a substantially resinous character which has heretofore found but little use. While similar in appearance to ordinary colophonium, it is usually widely different chemically and because of this, unfit for the many uses for which colophonium is adapted for instance, the resin obtained from gum pontianac is ordinarily unsaponifiable, and, therefore cannot be used to advantage in the manufacture of soaps, nor can it be advantagequsly employed in many varnishes because of its inability to combine freely and effectively with lime or other bases to form a materially hardened product similar to hardened rosin.

The object of my invention is to make use of such resins, now mostly waste products, in the manufacture of useful varnish compositions. This I accomplish by combining the resin with Chinese wood oil or tung oil or chemically similar drying oil, and by such combination I produce a useful composition which dries with a hard glossy finish, one which is exceedingly impervious to moisture and especially hard and durable. With this composition I also may employ other raw materials of the varnish industry including other resins in small quantity to secure certain finish effects and may, of course, incorporate with or employ in .these compositions a suitable quantity of a thinning material such as spirits of turpentine and petroleum hydrocarbon as benzin or hydrocarbons from coal-tar and shale oil as benz'ole and its homologues and the like, to secure the requisite consistency or modify the body.

Driers may be used if desired and for this purpose I prefer to incorporate with the Wood 011 prior to its admixture with the rubber resin, a quantity of manganese or lead borate, resinate, etc. It is desirable, however, to keep down to a minimum the amount of drier used, and I refer to have present in the finished product ess than one-tenth of 1% of these metallic oxids which produce drying effects and in many instances I omit the drying agent entirel as the rubber resin and the Wood oil furnisi a rapidly drying varnish per se.

Linseed oil, per se, is not adapted for use with said rubber resin, but may .be added to some extent to compositions made in accordance with my invention and the resulting varnishes are useful in certain cases where a slow drying product is'a desideratum. A satisfactory varnish stock in accordance with my invention is made by melting lbs. of gum pontianac and adding thereto lbs. of Chinese wood oil preferably the raw oil. When incorporation is completed, by heating and stirring for a short time, the mass is thinned with. 200 lbs. of spirits of turpentine. Another illustrative varnish-stock formula consists of 100 lbs. of gum pontianac, 100 lbs. boiled Chinese wood oil, 10 gallons'of turpentine and 5 gallons of benzin.

Another varnish-stock formula illustrative of my invention is as follows: 100 lbs. Chinese wood oil are heated with 5 lbs. manganese tianac resin are melted and heated and the two masses incorporated. W hen thoroughly mixed and somewhat cooled, 10 gallons of benziu are run in and the varnish settled or filtered to produce a clear product.

Among the gums which supply the resin suitable for suchcompositions are Gaboon lump, Impori seconds which co'htain sometimes 85 to 90% of resinous components. Nigel paste which is also highly charged with resinous matter, pontianac, already mentioned, Tuno gum and the like.

It should be understood that the material WhichI em loy is not the raw gum contaming both ru )ber constituents and the resin, but it is the substantially resinous product resinate, in a separate kettle lbs. of ponresulting from the extract ion of said raw gum, 1 1 o which resinous product, is free from or largely 7. A varnish composition comprising pontianac resin, wood oil, a thinner, and a drier.

8. A varnish composition comprising about equal parts pontianac resin and wood oil.

9, A varnish composition comprising about e ual parts pontianac resin and wood oil with w ich is incorporated a suitable quantity of a thinning agent.

Signed at New York in the county of New York and State of New York this 20th day of April A. D. 1907.

oARLEToN ELLIS.

Witnesses:

FLETCHER P. SCQFIELD, HARRY B. CHALMERS. 

